svn commit: r222837 - stable/8/sys/dev/pci

[John Baldwin]

Author: jhb
Date: Tue Jun  7 21:15:43 2011
New Revision: 222837
URL: http://svn.freebsd.org/changeset/base/222837

Log:
  MFC 221138:
  Only align MSI message groups based on the number of messages being
  allocated, not the maximum number of messages the device supports.  The
  spec only requires the former, and I believe I implemented the latter due
  to misunderstanding an e-mail.  In particular, this fixes an issue where
  having several devices that all support 16 messages can run out of
  IDT vectors on x86 even though the driver only uses a single message.

Modified:
  stable/8/sys/dev/pci/pci.c
Directory Properties:
  stable/8/sys/   (props changed)
  stable/8/sys/amd64/include/xen/   (props changed)
  stable/8/sys/cddl/contrib/opensolaris/   (props changed)
  stable/8/sys/contrib/dev/acpica/   (props changed)
  stable/8/sys/contrib/pf/   (props changed)

Modified: stable/8/sys/dev/pci/pci.c
==============================================================================
--- stable/8/sys/dev/pci/pci.c	Tue Jun  7 20:49:29 2011	(r222836)
+++ stable/8/sys/dev/pci/pci.c	Tue Jun  7 21:15:43 2011	(r222837)
@@ -1910,7 +1910,7 @@ pci_alloc_msi_method(device_t dev, devic
 	for (;;) {
 		/* Try to allocate N messages. */
 		error = PCIB_ALLOC_MSI(device_get_parent(dev), child, actual,
-		    cfg->msi.msi_msgnum, irqs);
+		    actual, irqs);
 		if (error == 0)
 			break;
 		if (actual == 1)